GCF & LCM

Anika made 36 jars of plum jelly and 48 jars of grape jelly.  She is putting the jars into boxes of identical size.  Each box will only have one kind of jelly.  What is the greatest number of jars of jelly she can have in a box?

• 6
• 12
• 18
• 24

Which number is a multiple of both 12 and 3?

• 3
• 9
• 15
• 24

Michelle has French class every third Saturday and karate class every other Saturday.  This Saturday she went to both classes.  When is the next Saturday that she will have both classes on the same day?

• in 2 Saturdays
• in 3 Saturdays
• in 5 Saturdays 
• in 6 Saturdays

Carlos has 32 iris bulbs and 40 tulip bulbs to plant.  He wants to plant them in rows with one type of bulb in each row.  He wants all of the rows to have the same number of bulbs.  What is the greatest number of bulbs he can plant in each row? 

• 4
• 8
• 16
• 32

Which pair of numbers has a GCF of 1?

• 51 and 17
• 20 and 9 
• 24 and 27
• 14 and 44

Jessica is making gift baskets.  Each basket has 1 jar of salsa and 1 bag of tortilla chips.  She buys the salsa in cases of 6 jars.  She buys the tortilla chips in cases of 4 bags.  What is the least number of baskets Jessica can make and have no jars of salsa or bags of tortilla chips left over?

• 4
• 8
• 12
• 24

What is the GCF of 18 and 42

• 1
• 6
• 9
• 18

Which number is the LCM of 3 and 5?

• 3
• 5
• 8
• 15

The GCF of two numbers is 8.  One of the numbers is 24.  Which of the following could be the other number?

• 32
• 36
• 42
• 48

Mandisa is making a seating chart for a banquet.  There will be 42 students from fifth grade attending and 60 students from the sixth grade.  Each table will have all fifth graders or all sixth graders.  She wants to seat the same number of fifth and sixth graders at each table.  What is the greatest number of students she can seat at each table?

• 6
• 10
• 12
• 21